Changes in the Firmware
Firmware Version 1.0.3 incorporates the following fixes and improvements:
1. Corrects a phenomenon in which the color of images varies depending on the metering mode selected during flash shooting.
2. Improves the reliability of communication when using the EF1.4X III or EF2X III extender.
3. Corrects the level display when the camera is held in the vertical orientation with the hand grip pointing downward.
4. Improves the reliability of communication via USB cable when using the Lens Data Registration function with EOS Utility 3.
Firmware Version 1.0.3 is for cameras with firmware Version 1.0.2 or earlier. If your camera's firmware is already Version 1.0.3, it is not necessary to update the firmware.
When updating the firmware of your camera, please review the instructions thoroughly before you update the firmware.
The firmware update takes approximately 4 minutes.
Preparations for the Firmware Update:
Windows
After the downloaded compressed file (.zip) is extracted, a firmware folder is created.
* Extracting the downloaded file: Right-click the zip file, and then select Extract All to extract the file. The extracted folder contains the firmware (file name: 5D400103.FIR / file size: 31,518,272 bytes) and instructions on the firmware update procedures (a PDF file in five languages: Japanese, English, French, Spanish, and Simplified Chinese).
Before starting the firmware update operations, please confirm the contents of the download, and carefully read through the firmware update procedures.
(The following is the history of past firmware updates.)
Q: Are the improvements from previous firmware versions included in Firmware Version 1.0.3?
A: Yes, the following improvements from the previous version are included:
(Previous) Version 1.0.2 improvements:
1. Improves communication reliability when using EOS Utility to register/update* new Digital Lens Optimizer.
Note: *Confirm that the camera firmware is Version 1.0.2 (or later).